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Polyolefin gas pipe and performance detection device thereof

A technology of polyolefin and gas pipes, which is applied in measuring devices, liquid tightness measurement using liquid/vacuum degree, and chemical analysis using combustion, etc. It can solve the problems of difficult capture, easy stress, and easy scratching of gas pipes and other issues, to achieve the effect of improving sensitivity, increasing the scope of use, and facilitating transportation and assembly

Active Publication Date: 2020-09-18
SHANGHAI ZHONGSU PIPE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for gas pipelines, the most obvious problem is that gas pipelines are easily scratched during transportation or assembly, and the resulting scars can easily cause stress problems
In addition, the gas quality is relatively light, and after leaking from the damaged part, it sprang out of the ground, but it is very difficult to catch it by traditional methods, and technological means are needed to capture the leaked gas in time, and then find the leak point

Method used

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  • Polyolefin gas pipe and performance detection device thereof
  • Polyolefin gas pipe and performance detection device thereof

Examples

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preparation example Construction

[0049] A second aspect of the present invention provides a method for preparing the polyolefin gas pipe, the steps at least comprising:

[0050] (1) Mixing: Mix the above raw materials to obtain a pipe premix; (2) Granulation: Granulate the pipe premix and cool to obtain a granular pipe mixture; (3) Forming: Extrude the granular pipe mixture Forming, traction, cooling, that is.

[0051] The preparation method of the polyolefin gas pipe described in the present invention is not particularly limited, and generally the preparation methods well known in the art are applicable to the preparation of the polyolefin gas pipe.

[0052] In some preferred embodiments, the steps of the preparation method of polyolefin gas pipes include at least: (1) mixing: mixing the above-mentioned raw materials into a kneader, setting the temperature at 80-90°C, and stirring Heating and mixing to obtain the pipe premix; (2) Granulation: put the pipe premix into a granulator for granulation, and cool t...

Embodiment 1

[0062] A polyolefin gas pipe, the raw materials include the following in parts by weight: 110 parts of polyolefin, 3 parts of polymer wax powder, 2 parts of vinyl silane compound, 0.8 part of composite flame retardant, and 0.3 part of antioxidant.

[0063] The polyolefin is a combination of HDPE and LLDPE, and the weight ratio between HDPE and LLDPE is 3:1. The density of the HDPE is 0.945g / cm 3 ; Melt flow index at 190° C. / 5.0 kg is 0.8 g / 10 min, purchased from HDPE (high density polyethylene) A 4062R 62429 / Saudi sabic. The melt flow index of the LLDPE at 190°C / 5.0kg is 2g / 10min; the density is 0.911g / cm 3 , purchased from LLDPE (Linear Low Density Polyethylene) LA-25 / Daelim, Korea.

[0064] Described polymer wax powder is PTFE modified polyethylene homopolymer wax powder, purchased from American Honeywell brand, model is 3405. The vinylsilane compound is vinyltris(2-methoxyethoxy)silane.

[0065] The vinyl silane compound also includes a grafting initiator and a tin-ba...

Embodiment 2

[0070] A polyolefin gas pipe, the raw materials include the following in parts by weight: 95 parts of polyolefin, 2 parts of polymer wax powder, 1 part of vinyl silane compound, 0.5 part of composite flame retardant, and 0.1 part of antioxidant.

[0071] The polyolefin is a combination of HDPE and LLDPE, and the weight ratio between HDPE and LLDPE is 2:1. The density of the HDPE is 0.947g / cm 3 ; Melt flow index at 190° C. / 5.0 kg is 0.7 g / 10 min, purchased from HDPE (High Density Polyethylene) XRT 70 / French Total. The melt flow index of the LLDPE at 190°C / 5.0kg is 0.5g / 10min; the density is 0.915g / cm 3 , purchased from LLDPE518N / SAABIC.

[0072] Described polymer wax powder is PTFE modified polyethylene homopolymer wax powder, purchased from American Honeywell brand, model is 3205B. The vinylsilane compound is vinyltrimethoxysilane.

[0073] The vinyl silane compound also includes a grafting initiator and a tin-based catalyst; the amount of the grafting initiator is 10% o...

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Abstract

The invention relates to the technical field of polyolefin gas pipes, and provides a polyolefin gas pipe. The polyolefin gas pipe at least comprises, by weight, 85-135 parts of polyolefin, 1-5 parts of polymer wax powder, 0.5-3.5 parts of a vinyl silane compound, 0.1-1.5 parts of a composite flame retardant and 0.05-0.5 part of an antioxidant. The prepared polyolefin gas pipe has the advantages ofvery excellent scratch resistance and stress cracking resistance, can be conveniently transported and assembled, and still has very excellent flame retardant property under the condition that the influence on the mechanical property of the pipe is avoided.

Description

technical field [0001] The invention relates to the technical field of polyolefin gas pipes, in particular to a polyolefin gas pipe and a performance detection device for polyolefin gas pipes. Background technique [0002] The use of natural gas has increased sharply, and pipeline network facilities are one of the basic conditions for the development of natural gas and an important symbol of national modernization. Therefore, urban gas pipeline network facilities have been vigorously constructed and developed rapidly, becoming a necessary guarantee for the survival and development of cities and an important national infrastructure. PE material is widely used in the field of water pipe and gas pipe manufacturing because of its high strength, high temperature resistance, good corrosion resistance, and non-toxicity. Because it will not rust and has strong flame retardancy, it is an ideal pipe material for gas pipes; among them, PE material has corrosion resistance compared wit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L23/08C08L27/18C08L51/06C08K5/13G01M3/04G01N3/08G01N3/12G01N31/12
CPCC08L23/06G01M3/04G01N3/08G01N3/12G01N31/12G01N2203/0017G01N2203/0019G01N2203/0048G01N2203/0066G01N2203/0067C08L2203/18C08L2201/02C08L2205/025C08L2205/035C08L2207/062C08L2312/08C08L23/0815C08L27/18C08L51/06C08K5/13
Inventor 刘志光郑祥义王立霞
Owner SHANGHAI ZHONGSU PIPE
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